google.load causes empty dom/screen

Question

I'm trying to add a google visualization asynchronous, but I am running into problems. I've narrowed it down to the google.load causing the problem. When google.load part of the js runs, I get an empty screen/dom. Any one know what I am doing wrong.

I've also tried using the google.setOnLoadCallback, I get the same result.

Any help would be great

Relevant code :

    $(document).ready(function () {
google.load('visualization', '1', { 'packages': ['geomap'] }, { 'callback': drawVisualization });


                function drawVisualization() {
                   $.ajax({
                        type: "POST",
                        data: "{'monitorId':'" + monitor + "','monitorName':'" + name + "','context':'" + context + "'}",
                        dataType: "json",
                        url: "WebService.asmx/LoadMonitorToolGeo",
                        contentType: "application/json; charset=utf-8",
                        processData: true,
                        success: function (msg) {

                            var obj = jQuery.parseJSON(msg.d);


                            // $(msg.d).hide().appendTo("#sortable").fadeIn();
                            $("#" + obj.context).find(".toolContent").hide().html(obj.data).fadeIn();

                            DrawWorldMap(obj.map, obj.context);

                        },
                        error: function (req, status, error) {

                        },
                        complete: function (req, status) {


                        }
                    });



function DrawWorldMap(response, id) {
    var data = new google.visualization.DataTable();
    data.addRows(response.d.length);
    data.addColumn('string', 'Country');
    data.addColumn('number', 'Popularity');
    for (var i = 0; i < response.d.length; i++) {
        data.setValue(i, 0, response.d[i].Country);
        data.setValue(i, 1, response.d[i].Popularity);
    }
    var options = {};
    options['dataMode'] = 'regions';

    var container = document.getElementById(id);
    var geomap = new google.visualization.GeoMap(container);
    geomap.draw(data, options);
}

});

Answer 1

This article helped me:

How to dynamically load the Google Maps javascript API (On demand loading)

What made the difference here was to define the callback in the load method options attribute:

var options = {packages: ['corechart'], callback : myCallback};
google.load('visualization', '1', options);

I believe this way google.setOnLoadCallback(myCallback) won't be needed anymore and fortunately, it seems when callback is added the method won't cleanup the page.